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| <div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestConnectedComponentImageFilter.png]]</div>
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| ==ConnectedComponentImageFilter.cxx==
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| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkImageFileReader.h"
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| #include "itkConnectedComponentImageFilter.h"
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| #include "itkRescaleIntensityImageFilter.h"
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| | |
| #include "QuickView.h"
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|
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| template <typename TImage>
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| static void CreateImage(TImage* const image);
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| | |
| int main( int argc, char *argv[])
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| { | |
| typedef itk::Image<unsigned char, 2> ImageType;
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| | |
| ImageType::Pointer image;
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| | |
| if(argc < 2)
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| {
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| image = ImageType::New();
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| CreateImage(image.GetPointer());
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| }
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| else
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| {
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| std::string fileName = argv[1];
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| typedef itk::ImageFileReader<ImageType> ReaderType;
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| ReaderType::Pointer reader = ReaderType::New();
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| reader->SetFileName(fileName);
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| reader->Update();
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| image = reader->GetOutput();
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| }
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| | |
| typedef itk::ConnectedComponentImageFilter <ImageType, ImageType >
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| ConnectedComponentImageFilterType;
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| ConnectedComponentImageFilterType::Pointer labelFilter
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| = ConnectedComponentImageFilterType::New ();
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| labelFilter->SetInput(image);
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| labelFilter->Update();
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| | |
| typedef itk::RescaleIntensityImageFilter< ImageType, ImageType > RescaleFilterType;
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| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
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| rescaleFilter->SetOutputMinimum(0);
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| rescaleFilter->SetOutputMaximum(255);
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| rescaleFilter->SetInput(labelFilter->GetOutput());
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| QuickView viewer;
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| viewer.AddImage<ImageType>( image, false );
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| viewer.AddImage<ImageType>( rescaleFilter->GetOutput(), false );
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| viewer.Visualize();
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| return EXIT_SUCCESS;
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| }
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| | |
| template <typename TImage>
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| void CreateImage(TImage* const image)
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| {
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| // Create an image with 2 connected components
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| typename TImage::IndexType start = {{0,0}};
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| start[0] = 0;
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| start[1] = 0;
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| typename TImage::SizeType size;
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| unsigned int NumRows = 200;
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| unsigned int NumCols = 300; | |
| size[0] = NumRows;
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| size[1] = NumCols;
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| typename TImage::RegionType region(start, size);
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| image->SetRegions(region);
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| image->Allocate();
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| // Make a square
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| for(typename TImage::IndexValueType r = 20; r < 80; r++)
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| {
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| for(typename TImage::IndexValueType c = 30; c < 100; c++)
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| {
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| typename TImage::IndexType pixelIndex = {{r,c}};
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| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| // Make another square
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| for(typename TImage::IndexValueType r = 100; r < 130; r++)
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| {
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| for(typename TImage::IndexValueType c = 115; c < 160; c++)
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| {
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| typename TImage::IndexType pixelIndex = {{r,c}};
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| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| }
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| </source>
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| {{ITKVTKCMakeLists|{{SUBPAGENAME}}}}
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